yuki24/active_admin — comment on commit 96bf393b624f443a566845d6be3125b4f9c30f74
File:  line 0
By yuki24:

try adding the following:

```
gem 'activeadmin', :git => 'git://github.com/yuki24/active_admin.git', :branch => 'enable_mongoid', :ref => 'a2e93fc07f07e6286e0f6312762574ce399cf897'
```

that version of the gem which head is the ref above doesn't contain `orm_adapter` so it might work for you.